Locking device for carriage-doors.



PAJTBN-TED OCT. 8, 1907.

- f A. NATHAN.

LOCKING DEVICE PON GARRIAGB DOORS.

`PPLICIiAIION FILED 001222. 1906.

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PATENTED OGT. 8, 1907. A. NATHAN. I A LOCKING DEVICE EUR CARRIAGE DOORS.

APPLICATION FILED 00T. 22. 1906.

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- PATENTED OCT. 8.1907. A. NATHAN. I LOCKING DEVICE POR CARRIAGE DOORS.

APPLIOATION FILED 0013.22, 1906.

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ARTHUR NATHAN, OF CHARLTTENBURG, GERMANY.

LOCKING DEVICE FOR CARRIAGE-DOORS.

Specification of Letters Patent.

Patented Oct. 8, 1907.

Application filed October 22,1906. Serial No. 340,044.

To all whom it may concern: l

Be it known that I, ARTiIUR NATHAN, engineer, a citizen of Germany, and a subject of the King of Prussia and Emperor of Germany, residing at S7 Goethestrasse, Charlottenburg, near Berlin, in the Kingdom of Prussia and Empire of Germany, have invented new and useful Improvements in Locking Devices for Carriage- Doors, of which the following is a specification.

'lhe present invention refers to a locking device for carriage-doors, particularly for doors of railway-carriages,` on ywhich the inside and the outside handles are arranged movable independently of each other. The important feature is that the inside handle is fitted with a catch or ratchet, which prevents the lock from being unintentionally opened from the inside, whereas at the same time means are provided to secure a joint and guided motion oi the two independently movable handles, when the inside handle is not caught by the ratchet or catch. Herein it will be of advantage to employ as a catch for such locking purpose a straight lever pivotally arranged lateral to the knob of the inside handle which lever engages with. a short arm, while locking the inside handle with a stop provided on The outer end of this short arm is suitably made in the shape of a hook, so that the lever while in locking position can catch beneath a correspondingly shaped projection provided on the inside of the door, whereby the inside handle is also secured against tensile strain.

In order to secure the moving of the second handle on the first one being moved, when the inside handle is not caught and when locks which are not self-closing are employed, a spring is arranged between and connected with both said handles.

In the accompanying drawings a mode of carrying out such an arrangement is exemplified, Figure 1 showing the profile of a carriage.l door with outside and inside handle partly in section, the lock itself being removed, and the inside handle being secured; Fig. 2 shows the inside handle unlocked; Fig. 3 represents a side view of the inside handle with securing lever; Fig. 4 represents a plan of inside handle with securing lever; Fig. 5 represents a detail; Fig. 6 represents a side view and a plan of the part provided on the inside of the door and serving as a stop and guide for the securing lever; and Fig. 7 represents a section through the stem and the parts connected thereto taken on line A-A in Fig. 1, in two different positions.

The inside handle 1, which has the crank-like shape customary in railway-carriages, has in handgrip or knob 2 a slot 3. In said slot 3 is arranged a spring 4, one end of which is attached to knob 2 and the other end secured to a double-armed lever 5. This double-armed lever 5 has its pivotal point 6 at the inside handle, and

`will again abut against edge 23 of sleeve 15.

the lower, shorter arm 7 of which has a hook-terminal, as seen in Fig. 3, and to catch under projection 8, (Fig. of the guide-rail 9.

The outside handle 10 is of the usual shape and is rigidly connected with the stem 11. Said stem 11 is of a round tapering shape at 12 beyond its usual square part. On this tapering part a dog-sleeve 13 is keyed, the end 13 oi which points toward the inside handle and is partly cut away to form stops. A second dog sleeve 14 (Fig. 5) is loosely arranged on said stem, the inner end 15 of which points towards sleeve 13, and is cut away in a corresponding manner to form stops for engagement with stops on sleeve 13. This sleeve 14 is keyed to the angular bore 16 (Fig. 4) of the inside handle l. The connection between the inside and outside handles is obtained by the stem 11 which extends through the bore 17 of sleeve 14 and bore 16 of handle 1, and has a nut 18 on its outwardly projecting end,

Ii a lock which is not self-closing is employed, it will be advantageous to slip a spring 19 on stem 11, one end of which spring is secured at 20 to stem 11, and the other end being attached at 21 to sleeve 14.

The operation is as follows 1When the door is closed,

the hooked arm 7 of the lever 5 will catch beneath the projection 8 of guido rail 9 and thereby prevent the inside handle 1 from being unintentionally pressed down. Notwithstanding this locking, however, the door can be opened by turning the outside handle 10, as the st ops 13/ and 15 of the two sleeves have sufficient play, to allow the turning of the knob of the outside handle around an angle of about 90, as shown in Fig. 7. The edge 22 of the lug 13 will thereby recede from edge 23 of lug 15. In a corresponding manner the door can also be closed by turning the outside handle 10 while the insidehandle is locked, whereby edge 22 of sleeve 13/ If on the contrary the door is to be opened from the inside, the knob 2 of the inside handle 1 is seized with the hand and the long arm of lever 5 on the side of said handle pressed into slot 3 against the tension of spring 4, whereby arm 7 is forced out and disengaged from projection 8, and the inside handle can now be'turned downward in the usual manner, whereby arm 7 will glide along the curve of rail 9. During this turning of the inside handle l, the outside handle 10 is turned also by stop 23 oi sleeve l5 pressing against stop 22 of sleeve 13/ and `thereby turning the latter and the connected stem 11 with handle 10` When the door is to be again closed by turning the outside handle, the inside handle is simultaneously 'turned into locking `position by the coperation of edges 22 and 23 in opposite direction. If, however, the door is to be closed by raising the inside handle, the

outside handle cannot be simultaneously moved by the coperation oi the two sleeves. 1f self-closing locks are used, particularly such as described in the British Patent No. 23239, 1905, the two handles are returned into locking position automatically both in the manner as in the former instance. It, however, the arrangement is employed with one of the known locks which is not self closing, the moving of the outside handle on the door being closed by raising the inside handle would only be effected by the iriction between the screw-nut 18 and the inside handle 1, if spring 19 Werc'not provided. When the inside handle is raised, said spring is put under tension, thereby tending to turn the outside handle. As soon as the inside handle reaches its locking position, lever 5 under the action oi the spring 4, will automatically slip into catching position, so that an unintentional touch oi the inside handle inside the carriage, as by leaning thc body against said handle or by jars or the like, cannot press down said handle.

The details of the device may be varied in manifold manner. The hook provided on lever '7 may be omitted and the lever 7 will then only press against stop S. However, it is oi advantage to employ such a hook, as a loosening of the safety and a bending olf the inside handle even under tensile strain is avoided. In place of the dog-sleeves with stops, any other suitable device may be employed for obtaining the same purpose.

Corresponding saiety-arrangements may also be iitted to the inside handle7 even itA the latter is oi any other construction or design, than the one described in the present speciiication.

Having now described my invention what 1 claim and desire to secure by Letters-Patent ot the United States isz* 1. In a locking device for doors of railway carriages with operatinghandles pivoted apart from each other,

withA coengaging stops carried by the shafts ol both handles and a catch arranged on the inside handle to engage a stop and .for preventing' the lock l'rom being,`- unintentionally opened from the inside, a spiral sprint", one end of said spring being connected with one of said handles, the other end being connected with the other handle.

2. In a locking device for doors et railway carriages the combination of operating handles pivoted apart from each other, coengaa'ing stops connected with the shafts of both handles, a lever pivotally connected with the inside handle, an engagingv member tor said lever on the inside of the door, a spiral springwound around the shafts of beth of. the operating handles, one end olf said spring`- being connected with one ot' said shatts and the otherend with the other shat't.

35. In a locking device for doors of railway car :es the combination ot` operating handles pivoted apart `troni each other, coengagingstops connected with the shafts of both handles, a lever pivotally connected to the inside handle, a hook on the tree end ot said lever, :l notch on the inside ot'; the door, said hook engaging said notch ior securing' the inside handle, means connected with both handles and independent et said engaging stops on said shafts :l'or securingthe joint guided motion of the operating," handles when the inside handle is dis engaged and the leek is closed by the turn nl' said inside handle.

et. In a locking`- device for doors ot railway carriages the combination ot operatinf.;l handles pivoted apart Troni each other, coeng'aging stops connected with the shafts of both handles, a straight level' pivotally connected with the inside handle, a hook on the tree end of said lever, a notch on the inside of the door, said hook cngaging said notch tor securingthe inside handley a spiral spring around the shafts of said handles. one end ol said spring bein;l connected with one of: said operatingl han dles and the other end with the other operati er handle.

In testimony whereof l have hereunto set, my hand in presence ot two subscribingl witnesses.

Witnesses Wonnmmn HAUPT, llnNni llasrnn. 

